Makela_Cronvall:Layout 1 19/5/08 11:27 Page 7
NORTHERN EUROPE PROFILE: RHK & VR-TRACK LTD
brake can be stopped before it enters the
tunnel. This arrangement complies with
SRT TSI recommendations aimed at
reducing risks in railway tunnels. There
will not be a hot-box detector between the
harbour and the tunnel, since trains will
be inspected in the yard before departure.
Tunnel structures and technical
systems are based on a risk analysis that
was conducted during the planning stage.
On the basis of the analysis, there are no
significant risk points in the tunnel, but in
designing systems, attention has been paid
to the possibility of a fire and problems
that might be encountered in extinguishing
a fire or removing smoke.
Clean water will be piped from drains
to pumping plants located at access
Figure 8: Basic cross-section of the Savio tunnel
tunnels and will then be pumped to
drainage ditches near the portal of each
access tunnel. Pumping plants will have detectors, and back-up pools can be supplementary lighting for video
separate collection and back-up pools for emptied into a tank truck at the lower cameras. Normally, lighting will only be
water coming from different directions. level of an access tunnel in an emergency. used near the portals of the tunnel or in
The pools have been dimensioned so that The railway tunnel will be illuminated accident or maintenance situations.
they can handle water flowing in an around vertical shafts and access Signage and safety lighting that meets SRT
emergency situation. The pumping plants tunnels and at both ends with fluorescent TSI requirements will lead to exits in
will be equipped with oil separation lights over a distance of 200-400 metres. accident situations.
systems and hazardous substance In some places for example, there will be The electrical feed for the tunnel's
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